Abstract
The intercalation strategy is successfully applied in tuning the interlayer distance of 2D membranes for efficient desalination and ion sieving. However, it is difficult to pursue a intercalant that is few nanometers in size and suitable for further chemical modification . Here, for the first time, we report the intercalation of soft particles-polyacrylonitrile gel particles (PAN GPs) inside the graphene oxide (GO) membranes, which allows for a tunable interlayer distance via the deformation of soft particles. Furthermore, the base-induced hydrophobic/hydrophilic structure of PAN GPs facilitates the water diffusion through the GO membrane. A fast and selective water permeation was observed through separation Cu-EDTA2-from water, with the permeance of 4-13 times higher than the reported 2D membranes. Intercalation of soft particles represents a promising strategy to fabricate high-performance 2D membranes.
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